Type-writing machine.



15L. com. TYPE WR|TING MACHINE. APPLICATION FILED 007. 2a. was.

Patented Apr. 29,1919.

mmgmlo INVENTUR lillflilllllllllll l l 691M Hi5 ATTEIRNEY UNITED STATES PATENT @FFTGFZ JOSEPH I1. CONE, 0F ILION, NEW YORK, ASSIGNOR T0 REMINGTON 'IYPEWRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

eonora.

Specification of Letters Patent.

Patented Apr. 29, 121? Application filed Dctober 23, 1918. Serial No. 259,321.

To all whom it may concern:

Be it known that 1, JOSEPH L. CONE, citizen of the United States, and resident of Ilion, in the county of Herkimer and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My invention relates to typewriting machines and it has for its principal object to provide improved means for attaching the returning springs for the key levers of a typewriting machine to the stationary framework and for adjusting said springs; although said invention can be applied or adapted to other similar series of springs. ll provide very simple, inexpensive, convenient and effective means for supporting the returning springs of the key levers, for adjusting said springs individually and also for adjusting the whole set of springs together.

To the above ends my invention consists in certain features of construction and combinations and arrangements of parts, all of which will be fully set forth herein and particularly pointed out in the claims.

One specific instance of my invention is illustrated in the accompanying drawings in which Figure 1 is a fragmentary front to rear vertical sectional view of the base part of a typewriting machine having my invention embodied therein.

Fig. 2 is a partial transverse vertical section through the series of restoring springs and their associated parts.

Fig. 3 is a section on the same line as Fig. 2 but on a larger scale and showing the adjustment of one end of the spring-supporting bar.

Fig. 4 is a fragmentary perspective view,

partly insection, of the spring-supporting bar.

Fig. 5 is a. front to rear vertical section on a greatly enlarged-scale through the springsupportingbar and one of the springs.

In the drawing, 1 represents the rectangular base casting of a Remington typewriter. Printing key levers 2 are pivoted on a rod 3 supported by 4 secured at 5 to the base casting 1. .At their forward ends the key levers 2 are guided by a second comb plate 6. The restoring springs 7 for the key levers 2, are helical tension springs hooked into holes 8 provided in the key levers for the purpose.

According to my invention the upper ends of these springs are supported by screws 10, preferably having their threads of such character and size that the screw can be screwed into the end of the spring itself in a manner well known in the art and shown in Fig. 5; but separate nuts can be employed, if preferred. The screws 10 have square heads 11 and said screws pass through holes 13 in a spring-supporting bar 12 that eX- tends from the rightto the left-hand side of the casting 1.

Said bar 12 has one or two ribs 14 extending adjacent and parallel to the row of holes 13 and having inclined sides engaging the straight lower edges of the heads 11 of the screws 12. Preferably said bar 12 consists of a strip of sheet metal folded into a channel bar with the opening downward, said channel bar having its vertical walls of such height as to give the requisite stiffness there to, and the screws 10 pass downward through the channel, where they are covered up and where they have ample length to provide for all needful adjustment of the springs. The top portion of this channel bar has the metal bent or slightly concaved downward as shown to form the two low ribs 14, one in front of and the other behind the row of holes 13; or, otherwise expressed, there i a concave 15 in the bottom of which the holes 13 are situated.

The head 11 of each of the screws 10 is of such a form and size that when said screw is drawn downward by the tension of the spring 7 the straight lower edges of the head of the screw rest on the inclined walls of the concavity 15 at the top of the channel bar 12 so that said concavity prevents accidental turning of the screws, as by the jarring of the machine,'because such turning would ina forked comb plate volv the screw head being cammed up by the inclined sides of the concavity against the tension of the spring. At the same time the inclination of said sides of the concavity, or of the ribs 14. is not so great but that the screw can be easily turned with a wrench to adjust the tension of the spring 7. It Wlll be seen that each of these screws can be adjusted to regulate the tension of its individual spring and that immediately the power of the wrench is removed there is no danger of the screw changing its position from any accidental cause further than, perhaps, to settle down by a slight turn to a position where the fiat sides of the screw are parallel to the length of the bar 12. By adjusting these screws the whole set of springs can be regulated as to tension, each spring individually. It will be noted that the heads 11 of the screws are on top of the bar where they are readily accessible for adjustment.

To provide for changing the tension on the keyboard as a whole, as for instance to adapt the machine for some operator who prefers a stiffer tension on thesprings than that originally provided, the bar 12 can be adjusted up and down as a Whole. At each end of said bar 12 rests in a notch between two lugs 16 on the side bar of the casting 1,

I said notches allowing of motion or adjustment of said bar up and down. The bar 12 is supported by a screw 17 screwed upward from beneath through a flange 18 of th base casting l. The upper end'19 of each of the screws 17 is reduced and passes through a hole in the top of the channel bar so that the end of the channel bar rests on'the shoulder 20 of the screw, whereas the reduced end 19 of said screw prevents longitudinal displacement of the 'bar 12. It will be perceived that said bar can be adjusted upward or downward by turning the two screws 17 and thus the tension of all the springs be varied. Such an adjustment is indicated in Fig. 3 where the bar is shown in full lines adjusted rather high for a still tension on the springs and in dotted lines adjusted to its lowest point for a weaker tension on the springs.

The adjusting means for the bar 12, as just described resembles that shown in Patent No. 1,215,7 23, to G. A. Seib, dated Feb.

13, 1917 but in said patent the screw corresponding to the screw 17, engages in the bottom of the spring-supporting bar. My construction is an improvement in that said screw is prolonged upward and takes into the top of the bar 12. whereby the pull of the springs 7 does not tend to rock said bar. Moreover, the screw. passing up between the vertical walls of the bar 12. prevents canting of said bar front and'back, independently of, or in addition to the lugs 16.

Various changes can be made in the de- 2. In a typewriting machine, the combination with a series of springs arranged in a row, of a sheet metal bar having a concavity longitudinal thereof and holes associated with said concavity, and adjusting screws in said holes and having heads of a form to cooperate with said concavity for the purpose set forth.

3. In a typewriting machine, the combination with a series of springs, of a sheet metal bar bent into a ribbed form and having holes associated with the ribbed part of the bar, and screws passing through said holes for adjusting said springs, said screws having heads of a form adapted for cooperation with the ribbed part of the bar to prevent accidental turning of the screws.

4. In a typewriting machine, the combination with a series of springs, of a ribbed bar having a series of holes, and. square headed screws in said holes for adjusting said springs, the square heads of said screws cooperating with the ribbed part of said bar so as to allow the screws to be turned by a tool but preventing accidental turning thereof.

5. In a typewriting machine, the combination with a series of springs, of an inverted channel bar of sheet metal having a concave top with holes therein, and a series of square headed screws in said holes for adjusting said springs, the square heads of said screws being seated in the concavity at the top of said channel bar.

6. In a typewriting machine, the combination with a series of springs, of a sheet metal bar folded into a channel shape with parallel walls and a top, and adjusting screws passing through holes in said top and having their threaded parts inside the channel in said bar and connected with said springs.

7. In a typewriting machine, the combination with a sp irig-supporting bar of inverted channel form, of adjusting screws for said bar passing through the channel in said bar and engaging the top of said bar.

8. In a typewriting machine, the combination with a series of springs and squareheaded adjusting screws for regulating said springs indi 'idually, of a sheet metal bar bent to form a concavity for cooperation being seated in the concavity at the top of said bar; and adjusting screws passing up- Ward through the channel in said bar and en gaging the top of said bar whereby the bar can be adjusted as a Whole.

Signed at Ilion in the county of Herkimer M5 and State of New York this 11th day of October, A. D1918.

JosEPr-r L. com.

Witnesstzs:

LINNIE 1B. BURNETT, Enmas'r B. BISHOP. 

